单选题A diesel engine is warmed up and white vapor is in the exhaust，this could indicate （）Aexcessive cylinder lubricationBa lugging engineCa leaking cylinder linerDoverloading of one cylinder
单选题
A diesel engine is warmed up and white vapor is in the exhaust，this could indicate （）
A
excessive cylinder lubrication
B
a lugging engine
C
a leaking cylinder liner
D
overloading of one cylinder
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